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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 52191] New: SHM file name for ISAPI Redirector is not unique when multiple ISAPI Redirectors on Website
Date Wed, 16 Nov 2011 02:20:33 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=52191

             Bug #: 52191
           Summary: SHM file name for ISAPI Redirector is not unique when
                    multiple ISAPI Redirectors on Website
           Product: Tomcat Connectors
           Version: 1.2.32
          Platform: PC
        OS/Version: Windows Server 2003
            Status: NEW
          Severity: normal
          Priority: P2
         Component: isapi
        AssignedTo: dev@tomcat.apache.org
        ReportedBy: timw@apache.org
    Classification: Unclassified


The ISAPI Redirector creates a shared memory file unique to the server instance
(a combination of server name, service instance id and application pool id)
that it uses to share information between the redirector DLL instances in each
process making up the server.

When multiple ISAPI Redirectors are installed on a single website, this name is
no longer unique for a logical ISAPI Redirector configuration, and corruption
(or at least incorrect use due to size miscalculations) of the shared memory
results.

The shared memory file name needs to have an additional component added to
refine this scope further. Options are:
1. use the extension_uri configuration option - this should be distinct (and
consistent?) for a logical configuration
2. provide a new configuration option to specify a unique filename component

#1 is the preferred option (as it doesn't involve the user discovering this
issue and finding out how to fix it).

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